Pls someone help me with this PLs!!!

Suppose your school costs for this term were $4900 and financial aid covered 3/4 of that amount. how much did financial aid cover? and how much do you still have to pay?

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read